Wavelength converting material for a light emitting device
View Patent ↗Embodiments of the invention include a luminescent structure including an InZnP core comprising an alloy including both In and Zn, and a shell disposed on a surface of the core, wherein the core has a crystal lattice constant that matches or nearly matches the lattice constant of the shell.
1. A nanocrystal comprising:
an InZnP core comprising an alloy including both In and Zn, a ratio of Zn to In substantially constant throughout the core; and
a shell disposed on a surface of the core;
a lattice mismatch between core and shell less than 1.7%.
2. The nanocrystal of claim 1 , wherein the lattice mismatch is less than 1%.
3. The nanocrystal of claim 1 , wherein the lattice mismatch is less than 0.5%.
4. The nanocrystal of claim 1 wherein the shell is lattice-matched to the core.
5. The nanocrystal of claim 1 wherein a diameter of the nanocrystal is at least 10 nm.
6. The nanocrystal of claim 1 wherein a diameter of the nanocrystal is at least 20 nm.
7. The nanocrystal of claim 1 wherein a diameter of the nanocrystal is at least 50 nm.
8. The nanocrystal of claim 1 wherein the shell is at least 5 monolayers thick.
9. The nanocrystal of claim 1 wherein the shell is at least 10 monolayers thick.
10. The nanocrystal of claim 1 wherein the shell is at least 20 monolayers thick.
11. A nanocrystal comprising:
an In x Zn y P core comprising an alloy including both In and Zn, wherein 0<y/x≤10 and a ratio of Zn to In substantially constant throughout the core; and
a shell disposed on a surface of the core;
a lattice mismatch between core and shell less than 1.7%.
12. The nanocrystal of claim 11 wherein the shell comprises ZnSe z S 1-z wherein 0≤z≤1.
13. The nanocrystal of claim 12 wherein y/x=2 and z=0.8.
14. The nanocrystal of claim 11 wherein 0.5≤y/x≤3.6.
15. The nanocrystal of claim 14 , wherein the lattice mismatch is less than 1%.
16. A nanocrystal comprising:
an In x Zn y P core comprising an alloy including both In and Zn, wherein 0<y/x≤10 and a ratio of Zn to In substantially constant throughout the core; and
a shell disposed on a surface of the core;
a lattice mismatch between core and shell less than 1%.
17. The nanocrystal of claim 16 wherein a diameter of the nanocrystal is at least 10 nm.
18. The nanocrystal of claim 16 wherein a diameter of the nanocrystal is at least 20 nm.
19. The nanocrystal of claim 16 wherein a diameter of the nanocrystal is at least 50 nm.